Marine structure.



F. l ERICKSON. MARINE STRUCTURE. APPLICATION man Aua.z4.`191a.

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UNITED STATES PATENT oEEIoE.l

FREDERIGWM. ERICKSON, 0F NEW YORK, N. Y.` l

MARINE STRUCTURE.

Specification of Letters Patent.

Patented Feb. 4, 1919.

Application led August 14, 1918. Serial No. 249,792.

To all-whom it may concern: l

Be it known thatI, FREDERIC IVM. ERICK- SON, a citizen of'the United States, residing at New York, in the county of New York .and State of New York, have invented s stronger than of wood and last longer than of all wood or steel, and practically {ire-4 proof.

Concrete bottoms do not require painting if the outer surface is properly treated, and do not become fouled easily, and being heavier than steel or wood add to the stability of the vessel. If the upper'portion only isrof wood or steel shorter beams and girders can be used, thus savingvaluable lumber, and the vessel can be constructed in shorter time, valuable considerations at the present time.

In carrying out my invention I use reinforced concrete forthe keel'son and bottom ofthe hull up to and including the bilge for the central part; at the forward end of the hull the reinforced concrete is carried u p vertically to make the stern construction, and aft vertically to make the stern after deck and poop-deck.

In the drawings which form a part of the specification and to which reference is made- Figure 1 is a horizontal section of al vessel showing the invention.

Fig. 2 is a cross-section of the hull.

Fig. 3 is an enlarged cross-section of a portion of the hull at the joint between the reinforced concrete forming the'bottom of the hull and the wooden sides, and

Fig. 4 illustratesa portion of cross-sec.- tion of a hull at a point between the reinforced concrete bottom at the line of the bilge and a steel upper section.

Referring to Fig.- '1,' A is vporting the deck timbers the alley tical steelribs bolted to the. concrete means jof a steel angle bar D2 held sez'zurelyV a reinforced f concrete bottom stem and stern of a hull,

,B, having planking and superstructure of wood or steel C. c is the rudder of any commercial type; D is the propeller connected to the engine E by means of the propeller shaft J resting in the bearing blocks 1, 2, 3, etc. The boiler plant lF is connected to the stack H in the usual manner. There is nothing unusual in the arrangement of the parts just referred to except their location on the concrete surface of the hull bottom,

which'constitutes an admirable foundation.

In Fig. 2, A is the reinforced concrete bottom, B the hull and plankng, C2, C2, vertical timbers or struts, G, G, are stringers holding the frame-work of the hull to the concrete A. H2, H2, are framing knees'suphull framing` C. J is the propeller shaft in K. L is the reinforced concrete main keelson. and O theflooring of the cargo hold.

In Fig. 3, A is the reinforced hull, B2 the hull planking above the bilge. a, a, are rods in the concrete to reinforce the same, and vextend athwart ships in the bottom, and are connected at either end with holding down bolts c2, by means of joints or eyes b, b. d is a sleeper bolted to the concrete base of thehull by the'series of bolts c2, 02,' the joint between the sleeper and the concrete is made secure by the metal key -f, running the entire length ofthe sleeper.

sleeper and the concrete, Iasphalt, mastic E2 or other suitable seal is installed.

In Fig. 4, A is the reinforced concrete' section, Bs the steel hull plating, 'C3 are verbase by in place by the hold down bolts c3, 03, etc.;

whlch are secured to reinforcing rods a, a,

etc., in the concrete base by means of the joints or eyes at the points b, b, etc.

The joint between the steel angle bar and the concrete is made secure and water-tight.

M and; N are side keelsons I on the vertical by any suitable lplastic material indicated t by the line e e.

I clalm as my invention".

' 1. A marine vessel having the lower portion of itshull composed entirely of remforced concrete with substantially straight los edges, sleepers anchored to said edges, and a In testimony whereof, have signed my 10x superstructure of lighter 4sec'nonal material name to this specification in the presence of secured to said s1eepers. Vtwo subscribing Witnesses, this 10th. day of A marine vessel having the lower por- August, 1918? 'g tiOnOf Composed .entirely Of reinu -forced concrete with substantially straight edges, heavy Wood sleepers anchored to lsaiol Witnesses: v edges, and a Wood superstructure secured who E. ERICKSON,

said sleepers. v C. TOMASCHEK.

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